Draft-tube.



PATENTED MAY 5, 1908.

H. A. MAXWELL.

DRAFT TUBE.

APPLICATION FILED MAY 1, 1907.

3.8HEET8-SHEET 1.

PATENTED MAY 5, 1908.

H. A. MAXWELL.

DRAFT TUBE.

APPLIOATION FILED MAY 1, 1907.

a SHEETS-SHEET 2.

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. IN N H #WJW- PATENTED MAY 5, 1908.

H. A. MAXWELL.

DRAFT TUBE.

APPLICATION FILED MAY 1, 1907.

a sums-$112M a.

HERBERT AQ MAXWELL, OF MEDFORD, MASSACHUSETTS DRAFT-TUBE. v

' Specification of Letters Patent.

Patented May 5, 1908.

Application filed May 1, 1907. Serial No. 371,289.

To all whom it may concern:-

Be it known that I, HERBEliT A. MAXWELL, a citizen of the United States, and resident of Medford, in the countyof Middlesex and State of Massachusetts, have invented new and useful Improvements in Draft-Tubes, of which the followin is a specification.

My invention re ates to draft tubes such as are employed in soda fountains, for charged or aerated liquids, and conslstsln improvements in the construction of draft tubes by which their operation is facilitated and by which they can be assembled or disassembled with ease and celerity whenever re uired.

n the drawings hereto annexed which illustrate an embodiment of my invention and its preferred form, Figure 1 is avertical cross section along the line L of Fig. 2; Fig. 2 is an elevation partly in cross section, the

section being taken along the line 2, Fig. 1

and Fig. 3 is a lan view partly in horizontal section along tfieline 3 in Fig. 2. 4 is a vertical section showing a modification of my improvements, and their application to a special purpose.

I provide the housing A, which is adapted to be secured to the casing of soda water ap-' paratus or to a standard suitable to the purpose. This housing has a lower screw threaded aperture A into which the guide tube A is screwed, the said guide tube preferably formed so as to givea neat ap earance and roper finlsh to the fixture, and the orifice X 111 the front of the housing which is also screw threaded and usually closed by the screw threaded cap or bonnet A. In the interior of the housing, I place the valve seat B which may be a fiat washer of such material as white metal, or hard water-proofed leatherboard, vulcanite or such other material as may be suitable to the or ose. This valve seat B is inserted and el in the recess B and has an aperture C which registers of the delivery tube D consists in the valve art D in which the orifices or ports D and 4 are formed, the orifice D communicating with the large outlet D and the orifice D communicating with the inner jet D The erwise secured to the housing.

delivery tube D is preferably constructed of a single iece of hard rubber which is on the face w ich constitutes the valve proper, sha ed so that it Ina operate in conjunction with the valve seat The movement of the deliverytube D and consequently of its valve portion D is'reciprocal in a straight line up and down andconsequently the orifices or orts D D are so placed that this reci roca movement of the delivery tube D wil bring the ports D D alternately into register with the central orifice of the valve seat which communicates in turn with the suppl pipe C. This reciprocating movement of t e deliverytube D and the valve portion D is accom lished by means of the external operatin andle E whereof the yoke E straddles t e housing A and is secured at either side tothe trunnionsli] which turn in suitable bosses or hearings in thehousing A. These trunnions E have heads E at their inner ends. Each of these heads carries an eccentrically placed in E, the ins E working in grooves D ormed in t e cheek plates D which are secured to the head or valve portion D jOf the delivery tube D. These grooves D are preferably formed so as to lie straight across the cheek plates in a horizontal direction with the ends of the grooves open and the center line or axis of the trun- 1110118 E is offset from the center line of the then-be withdrawn from the housing throughthe guide tube A L In order to hold the valve portion D of the delivery tube D ro erly to its seat, I provide' the presser w ich consists of a square ended pin forked so as to carry the anti-friction presser roller F. The uide plate G is seated'upon the flange A at t e bottom of the screw threaded orifice A This plate has a square central aperture at G and in order that this s uare aperture may always be brought to t e same position, the plate G is notched so as to admit the small lug or key g which holds the plate G against accidental rotation. The square portion of the presser screw being screwed through a threaded orifice in the center of the bonnet A. Washers F are laced upon the cylindrical stem]? if desired Upon that face of the head D of the deliver tube D which is presented to the presser rol F, there is )referably secured a parts of this apparatus is as follows: Theonnet A being removed, the handle E is allowed to swing down over the orifice A until the pins E are out of the way of the delivery tube D which is then inserted through the guide tube A with its valve face toward the valve seat B. Then the handle E is raised and the the chee plates D". Next the guide plate G is put in place by being seated upon the flange A and the presser pin F with its attached roller F is passed through the square orifice G in the guide. plate G, care bein taken to do this with the axis of the roller horizontal; Then, I if desired, the washers .F are placed u on the cylindrical stem F of the presser The bonnet A is then-screwed to place in the orifice A and the thumb screw F is screwed into the central aperture ofthe bonnet A until a bearing is reached a ainst the square portion of the presser pin.

ith the bonnet A in position on the housing, it acts as a stop so that the yoke can- .not be lowered far enough to free the plus E from the cheek late grooves D and it is therefore impossible for the delivery tube D to be accidentally freed from its normal su port by the pins E. In operation when t e landle E is vertical, "as shown in Fig. 1,

neither of the ports D or D will be in register,

with the aperture 0; When it is desired to deliver liquid through the large outlet D the handle E is-brought forward or toward the bonnet A until the port D registers with the a erture G. Then, when it is-desired to emp oy the jet nozzle D the handle E is rocked backward until the port D registers with the aperture C. Very slight pressure need be exerted upon the presser roller F by the thumb screw F in order to keep the valve tight and properly seated. If at any time there are evidences of a leak the valve can be brought to its seat by slightly increasing the ressure of the roll F by means of the screw F If for any reason, it is desired to take down the apparatus for examination or cleaning, the supply pipe C being first closed by such other valve as is usual y provided and which is not shown herein, the reverse of the above described operation can be gone through quickly and readily.

Referring now to Fig. 4 of the drawings which shows a modification and a special appins E guided into the grooves D in plication of the improved draft tube above described, it will be seen that therein the housing A, valve seat B, supply pipe C, deliver tube D and presser F are constructed in su stantially the same manner as in the a paratus shown in the other figures of. t e drawin s and are similarly operated by.the externa handle E. In the modified form shown in Fig. 4 however, I utilize the up-and-- down movement of the delivery tube D to perform still another useful function. In-

stead of termmating entirely outside the .a

paratus, the delivery tube D projects from t e guide tube A into a collecting chamber H which is secured to the housing by means of the nut or collar H which screws onto the external thread provided on the uide tube A. A packing ring H together wit packing material H serves to make a tight sliding joint between the delivery tube D and the parts which surround it.

secured to the main portion of the delivery tube D, and extends through the collecting chamber H to or through the openin H thereof. Upon the prolonged jet tube 8 there is mounted the stop D which slides on the jet tube and is pressed downward by means of the s ring D.

= It as been observed by those whose business it is to dispense beverages at soda fountains that the quality of the beverage is improved if the charged water which forms the major portion thereof is first drawn into a proper receptacle and then poured gently therefrom into the glass wherein the beverage is finally mixed. The collectin 'cham ber H performs the function ofsuc intervening receptacle, the operation of the deliver tube in connection therewith, being as follows: When the handle E is rocked so as The jet orifice D is at v the end of a prolonged jet tube D which is to bring the aperture D into register with the valve port 0, the delivery tube D is projected from the housing A and the stop D carried upon the jet tube D closes the openrocked so as to close the valve aperture D at the same time lifting the delivery tube D, jet

tube D and sto D, and, under a gentle pressure from wlthin the chamber H the charged water therein collected flows into the glass. Then, if for the final mixing a' forcible et is desired, the handle E is rocked still further to bring the orifice D into register with the port 0.

The special form of draft tube shown in Fig. 4 can be assembled or taken down exlass from which the beverage is to be drun .is placed under the opening H and the handleE.

, erate with the valve portion of the delivery 'let end and a valve ssasse' actly as that shown in Figs. 1 to 3, and with the same'facility.

What I claim and desire to secure by Letters Patent is:

l. The combination in a-draft tube of a housing, a valve seat therein, an aperture in the seat, a supply ipe communicating with said aperture, a de ivery tube having an outortion, a port in said valve portion, said delivery tube being movably mounted, an opening in said housing opposite the valve seat provided with a bonnet, a removable guide plate thereunder, and a presser adjusta ly mounted in the bonnet and having a bearing in said plate, said presser to bear on the delivery'tube to hold the valve portion thereof against the valve seat and means to move the delivery tube to open and close the valve port. I

2. The combination in a draft tube, of a housing, a valve seat in said housing, an opening in said housing below the valve seat and a delivery tube movably mounted in and removable through said opening in the housing, a valve portion on said delivery tube to bear on said valve seat, another opening in the housing opposite said valve seat, a removablebonnet for said opening, and an adjustable vpresser mounted in said bonnet to bear against the delivery tube to hold its valve portion against the valve seat, valve ports and passages in the delivery tube and externally operated means to move the delivery tube to open or close its valve ports.

3. The combination in a draft tube, of a housing, a delivery tube having a valve portion and a valve seat in the housing to 006ptube, operating means for the delivery tube including trunnionsand eccentric pins connected with an external operating handle, said pins entering grooves in the delivery tube to reciprocate the latter by movement of the said handle.

4. In a draft tube, the combination of a housing, a valve seat therein, an o eningin the housing, a delivery tube movab e in and removable through said opening, a valve on said delivery tube cooperatin with said valve seat, means to move said elivery tube to operate its valve portion, said means hav ing a pin and groove connection with the delivery tube, normally to support the tube, and a presser, bearing on the delivery tube to hold its valve portion seated.

5.- In a draft tube, a housing, a valve seat in the housing, a delivery tube, a valve portion thereon, transverse grooves in said delivery tube, trunnions in the housing and ec- I nions, to move the delivery tube in relation to the valve seat.

6. In a draft tube, a housin a valve seat in the housing, a delivery tube having a valve portion, transverse grooves in said delivery tube, trunnions in the housing, eccentric pins on said trunnions, the axis of the trunnions being ofiset toward one end of said grooves to permit disengagement of the pins and grooves.

7. In a draft tube, a housing, a valve seat therein, a delivery tube, havin a valve portion, movably mounted in saig housing, an aperture in the housing throughwhich the delivery tube extends, transverse grooves in the deliver tube, trunnions in the housing, eccentric pins therein to work in the grooves to move the delivery tube, said trunnions being ofiset toward the end of saidooves, to permit disengagement of the pins and grooves, an external handle, secured to the trunnions, a stop on the housin to prevent abnormal movement of the ban le, said stop removable to permit such abnormal movement of the handle as will disengage the said pins and slots, and release the delivery tube.

8. The combination in a draft tube, of a housing, a valve seat therein, a delivery tube, a valve dportion thereon, said deliver tube mounte to move up and down, a col ecting chamber on the housing surrounding the delivery tube, an outlet from the collecting chamber, and a stop forsaid outlet carried b the delivery tube, to open and close the co lecting chamber, and means, external to the housin to move the delivery tube;

vQQI e combination in a draft tube, of a housing, a valve seat therein, a delivery tube, a valve portion thereon, to 006 erate with said seat, passages in the de ivery tube stop on the jet tube to open or close the collecting chamber opening, and means, external to the housing to operate the delivery tube.

Signed by me at Boston, Mass, this 30th 110 day of October, 1906.

HERBERT A. MAXWELL.

\ Witnesses:

JOSEPH T. BRENNAN, JosEPmNE H. RYAN. 

